Finder beachball on server interruptions

I'm having some oddball issues with a 27" iMac i7 14,2

We have three of these machines in a print production environment, (along with some lesser used 10.5 and 10.6 machines) and this problem only appears on mine, one of the 14,2s. From time to time I'll have a server dropout (usually an hour after I arrive for work, often again through the day) which is sometimes a server dropout that affects the other macs too. They seem to handle recovery a lot more gracefully though, as they'll have the finder popup that lets them know the server has disconnected, and no other real effect.

Mine however, just beachballs every app using a file on the server. Typically that's finder, indesign, illustrator, and photoshop.

Sometimes, after some time beachballing (from 5 to 30 minutes) the same little popup tells me the server has disconnected, I'll dismiss it and all will be well. The adobe apps will recover all I've been working on and I'll go about my day. Mostly though, it'll just stay beachballing and I'll have no option but to force restart. It's about a fifty-fifty chance on a restart that I'll recover what I've been working on.

We have a G5 running OSX Server as the AFP server we're connecting to. It's due for replacement very soon. We have no server issues with the older 10.5 Macs.

Logs when the beachballing is occuring have plenty of this throughout:

2/03/2015 11:38:56.000 am kernel[0]: ASP_TCP ReplayPendingReqs: replaying slot 26 with reqID 38619 afpCmd 0x3C on so 0xffffff802bee3770

2/03/2015 11:38:56.000 am kernel[0]: ASP_TCP ReplayPendingReqs: replaying slot 27 with reqID 38620 afpCmd 0x22 on so 0xffffff802bee3770

2/03/2015 11:38:56.000 am kernel[0]: ASP_TCP ReplayPendingReqs: replaying slot 28 with reqID 38621 afpCmd 0x22 on so 0xffffff802bee3770

2/03/2015 11:38:56.000 am kernel[0]: ASP_TCP ReplayPendingReqs: replaying slot 29 with reqID 38622 afpCmd 0x22 on so 0xffffff802bee3770

2/03/2015 11:38:56.000 am kernel[0]: ASP_TCP ReplayPendingReqs: replaying slot 30 with reqID 38623 afpCmd 0x22 on so 0xffffff802bee3770

2/03/2015 11:38:56.000 am kernel[0]: ASP_TCP ReplayPendingReqs: replaying slot 31 with reqID 38624 afpCmd 0x11 on so 0xffffff802bee3770

2/03/2015 11:38:56.000 am kernel[0]: ASP_TCP ReplayPendingReqs: replaying slot 0 with reqID 38628 afpCmd 0x22 on so 0xffffff802bee3770

2/03/2015 11:38:56.000 am kernel[0]: AFP_VFS afpfs_DoReconnect: get the reconnect token

2/03/2015 11:38:57.741 am WindowServer[108]: common_reenable_update: UI updates were finally reenabled by application "Finder" after 454.71 seconds (server forcibly re-enabled them after 1.00 seconds)

2/03/2015 11:38:57.742 am Finder[220]: void CGSUpdateManager::log() const: conn 0x10b37: spurious update.

2/03/2015 11:43:54.000 am kernel[0]: process WindowServer[108] caught causing excessive wakeups. EXC_RESOURCE supressed due to audio playback

2/03/2015 11:45:16.534 am Remote Desktop Connection[806]: objc[806]: Class NLAssertionHandler is implemented in both /Applications/Remote Desktop Connection.app/Contents/Frameworks/mbuinstrument.framework/Versions/14/mbuinstr ument and /Applications/Remote Desktop Connection.app/Contents/Frameworks/TSClient.framework/Versions/14/TSClient. One of the two will be used. Which one is undefined.

2/03/2015 11:45:30.659 am ntpd[91]: ntpd: time set +0.241694 s

2/03/2015 11:45:30.662 am com.apple.time[166]: Interval maximum value is 946100000 seconds (specified value: 9223372036854775807).

I started browsing to write this post after the second occurence today happened 11:31AM, and noticed Illustrator and Finder started responding again right around 11:45AM.

Any clues? I can post the entire log entries from approx 11:31 when it began beachballing until 11:45am if that's any help.