Ozzy,
Before you remap, you should seriously consider a couple of minor mod's:
DV (most favoured by SCN is the Forge 007P)
Induction (various options, but you should consider assisting the breathing)
If limited by funds / insurance then Stg.1 is a good start, will realise ~ 15-25 more BHP straight off the bat.
I chose to get as much done before I remapped, purely so that I got the most from it.
The map was the last thing I did after all the mod's listed in my sig.
Have a nose around on the various Re-Map sites / suppliers and see which one you like the read of most.
Also have a nose around the forum, as this topic is fairly regular on here.
Also see if you can get along to some of the meets, and ask a nice fella SCN'er to take you our for a spin so you can get a feel for what you'll get for your money.
Hope that helps.
Dmm
PS - As per Lodgey - Revo & APR do 5/6hr free trials...always worth a go??!