does SSD have garbage collection and if not will Trim enabler work

Hello!

I am in need of replacing my APPLE SSD 128. Its too small.

I have read that performance degrades over time if TRIM isn't supported natively and that some SSD´s have a feature called "Garbage Collection" which is an alternative to TRIM that does not require OS support.

1) Does anyone know if samsung ssd 256 sata3.0Gbps or LITE-ON LAT-256M2S 2( I can get them for 250USD/each on the net) is well suited(has Garb Coll.) for my mbp?

2) And if not, will TRIM Enabler for Mac groths.org work for me (OS X 10.6.8)?

regards Joakim from Norway