I think the B5 (non pro) would be a fantastic choice at a great price point. It is reliable, will make plenty of power, and has great run time as well. My biggest reason is for the price and your experience level. At this stage of the game, a Pro, CRE, or some other modified engine just isnt going to provide you with much other than a smaller wallet.

When it comes to servos, the Hite 7950 (steering) and 7940 (throttle) are tough to beat. They're priced well, have fantastic customer service, and are exceptionally reliable. I just had a 7950 start to fail and it will be 5 years old next month! I have 5 7940s in various vehicles and 2 7950s (truggy and buggy). They also just released their brushless equivalents that looks very nice but for the money, the 7940/50 is a tough combo to beat. The 7955 is a bit cheaper but has a cult following and works great on unregulated LiPo even though it isnt advertised as a LiPo friendly servo. I'm not a fan of Savox but I've only had one (sold it and picked up another Hitec).

LiFe packs just dont bring any advantage to RC. Go LiPo, you will be happier in the end.

Edit: if you get the Werks engine, go with a 2058 pipe. It is very versatile and will work well on many different engines down the road.