What I would recommend is dual pistols/radiation armor. Dual pistols has some great utility and is a very effective set, IMHO. Radiation armor provides a lot of great performance and survival tools right out of the gate. One thing I could recommend, however, is to go with level 25 or 30 generic invention-origin enhancements - they aren't very expensive, they'll do the job all the way to 50, (and even beyond),, and once slotted, you'll never have to worry about them expiring/turning red...