FTSE 100 Tracker ISA

[davepoth]

I have a bit of money from an inheritance, and since I've been a good boy and "maxed out" my ISA for the last few years I feel I'm in a good enough place financially to take a bit of a punt on the stock market.

I'm not looking to go mad though, so all I want to do is put the rest of this year's ISA limit (so £10k give or take) into a FTSE 100 tracker. I've been looking around a little bit (but not too much yet) to try and find the best deal but I'm struggling a little bit to figure out what the most cost effective fund/wrapper combo is going to be.

Does anyone have any thoughts?