You can find some good deals on the old Sig 150W now that the tc one is out.
This may be a good option, the sig 150's that aren't temp control are going around $62 to $70 shipped, and are a proven mod. The ipv4s in my opinion is one of the best temp control mod values around, although I've never even used one, but I will be ordering one eventually. Personally I'm waiting on the the istick 100 to be out for another month than I'm going to pick up at least one depending on reviews for a beater mod.
If you don't mind a single battery mod, the sigelei 75 watt tc ($60 ish), the ipv mini 2 ($50 ish) and the ipvd2 ($55 ish) are all solid mods for good prices, and the 75 to 70 watts they go up to may be all you need for quite a while! You don't need to use the tc, but can experiment with it eventually if it's already there.