Depends entirely on your budget and what you're willing to spend. Putting all patent lawsuits aside, Apple used Samsung SSDs in their machines and Samsung 840's are generally regarded as among the best you can get. There's also a decent range between the 840 basic, pro or evo. Stick to the basic range if you don't want to spend too much, would still be a beast of an upgrade.
Another option if you want something with a bit more capacity but with a bit more pep than a HDD would be a Seagate Hybrid drive. Nowhere near as good as a SSD but gives you faster boot times and capacity similar to a standard HDD.
I think i'm looking at around 250gb i don't see a need in going any higher in all fairness, what is the brand to look at?
Also aside from the SSD i've just upgraded the 4GB of ram to 16GB of corsair ram, which i believe is better than the crucial if i'm correct?
Alex
Corsair ram is better. I'm looking at upgrading the ram in my MB Pro having just discovered an EFI update actually allows it to use more and frankly I was surprised at how expensive crucial ram was.
As far as SSD brands go, lots of people will have opinions here but personally I'd go with a samsung 840 as first choice (which 250gb model is up to you and your wallet. Any would drastically improve your mac's performance though EVO would be the top choice).
After samsung, second choice for me would be a crucial m500.
I came across the corsair really cheap cheaper than the crucial I did buy privately though only packet opened!
But yes I agree when I saw what crucial were asking it was a shock!
Great my next question is, is it easy enough to put one in a hdd caddy to carbon copy I've never done it before not used an SSD
Alex