I wouldn't go with Belcher, IMHO.
If he want to start playing T1 he would buy useless cards for every other deck he might want to play, or try. Not counting that belcher can be stopped easily by an easy lock or a good-aimed FoW.
With BobTPS he'll have some useful t1 cards like underground sea, duress, Force of Will, brainstorm, dark confidant, fetches and tutors that can be used in almost every other archtype.
Then, if his meta remains proxy, he could buy in a future some grim tutors and make a grim/pitch/street/seize Long.
All, obv, is IMHO

EDIT: i've read again the post, he said he play mainly control or aggro control, so he could have already the FoW, Brainstorm, Duress, USea, and Confidant...so it's really cheap to make a TPS then.