upgrade from 10.4

Perhaps you helped me TOO MUCH. I have very basic needs (As a measure, I have 200GB of 230GB disc space left....could probably dump more than half of that, and I believe I've had it since 2007...and I have a newer Imac that is what I use most often by far.) and was merely wondering whether anyone had any notable problems upgrading. Clearly you didn't, but I'm hopeful I'll hear from people like myself, with a lower level of sophistication, who either found it a piece of cake or a mini-nightmare....

Here's my overview:

Hardware Overview:

Model Name: iMac

Model Identifier: iMac6,1

Processor Name: Intel Core 2 Duo

Processor Speed: 2.16 GHz

Number Of Processors: 1

Total Number Of Cores: 2

L2 Cache (per processor): 4 MB

Memory: 1 GB

Bus Speed: 667 MHz

Boot ROM Version: IM61.0093.B07

SMC Version: 1.10f3

Serial Number: W864723JVGP

Do you see any concerns other than memory? On that issue, I really don't know what my constraints are....affordability isn't one. I don't remember whether I added memory myself or had some added when I bought the machine:

BANK 0/DIMM0:

Size: 512 MB

Type: DDR2 SDRAM

Speed: 667 MHz

Status: OK

BANK 1/DIMM1:

Size: 512 MB

Type: DDR2 SDRAM

Speed: 667 MHz

Status: OK

Thanks for your help, but anything other than a seriously dumbed down response for a novice is certain to go over my head.

ps. I have added very little in terms of apps to the basic machine. Do I need to review the insanely exhaustive list provided in order to proceed comfortably?

I'm not having any discernable speed problems now.....you're not suggesting the upgrade might slow things down, are you?

Are you saying that buying 2 of these (2GB version):

http://store.apple.com/us/memorymodel/ME_IMAC_AL_24_G1

and one of these:

http://store.apple.com/us/product/MC573/mac-os-x-106-snow-leopard

.....would put me "in business"?

BTW...Internet and eMail are my only uses as well.

Subjectively, given that this is a backup machine and my needs are basic, this is worth doing versus sinking 2k into a new Imac, isn't it? I'm just trying to get all the features out of my Gmail/yahoo mail accounts and maybe add Google Chrome, etc..

Thanks again.