How's the Spider Trike set Pete? I've heard nothing but bad reviews for it (although I might pick it up on clearance just for the Electro)
The one I got wasn't the one with Electro - it was the cycle one with Nick Fury, a shield vehicle and Venom.
I have thought about picking up the Spider-Trike one if only to get the Electro mini-figure but I haven't pulled the trigger on that one yet.
Like you, I'll probably wait for there to be a promo/sale at Lego shop before getting many more sets - I did see the Daily Bugle set for a great price on WalMart.com - so I might grab that one but otherwise, hold off on any others.