You haven't given us enough information to enable us to make a recommendation "fairly heavy and like to push myself" doesn't tell us much. What's your DIN setting? http://www.dinsetting.com/dinchart.htm
Your choice is limited by availability, the UK is a very small market (less than 30,000 pairs a year) and 95% of bindings are sold with skis so the shops don't stock that many extra bindings. What do your local shops stock?
I doubt if you will find anything approaching the price of the Storm bindings, my information is that the 97mm brakes will fit a 99mm ski, you could confirm this by contacting Heads UK distributor (Tyrolia is owned by Head). Jon's ski tuning in Nottingham http://www.jonsskituning.co.uk/content/view/43/65/ will mount them for 25 quid. Depending on where you're going on holiday you could get them mounted in resort.
