hi, im buying an Octavia vrs and i just wondered what to look out for?

Ive also been offered a Blue Flame exhaust system for it including sports cat, is this any good? What sort of power gain should i expect from this?

http://www.briskoda.net/forums/search.php

If you search around the forum you will find that the two main exhausts are either the blue flame or the miltek. Both are good, it just seems to be personal choice on which one you want. The gains from the exhausts on their own are OK but it puts you in good stead when you go for the re-map.