In my opinion, you need to do something to get rid of deleted data, or the drive will get near-full and choke.
I have been using a very small SSD as a boot drive for a while, and periodically consolidate free space followed immediately by erasing free space with a third-party utility. I believe this has kept me out of trouble. My son has been using SSD in his laptop and doing nothing for maintenece, and he has killed two drives in a year.
Trim Enabler utility from groths seems to be working, and makes things simple. Your mileage may vary.
There is firmware based garbage colection. It works best when there is TRIM as well. TRIM is or will be part of the SATA 3.1 and later specifications.
There is a lot to look at with SSDs. Some good FAQs on the subject adn their DNA.
Having as much free space as you will write to the boot drive during a month is one good rule of thumb. Having 20GB at least or 20% free is another. Mac OS and Apple does have TRIM but only for Apple firmware SSDs but Apple does use Samsung so just a guess but those might make a compleling choice, and a good name brand,
OWC SSD failures and early deaths are too command and frequent for my taste, and not just a batch - trouble with their PCIe SSD also. - note: some vendors will not support the 3,1 Early 2008 because of issues with its PCIe 2.x implementation - and are or will not be bootable (vendor supports and recommends for 2010 and okay in 2009).
2008 was the first to get EFI64, and PCIe 2.0 for one thing.