I want to buy BiaB to assist with music writing and recording. I use Logic but find I don't get enough control over loops etc and Drummer is good, but I never find the exact beat I want.

If I purchased the MegaPAK would I be disappointed and wished I'd bought the UltraPAK? Or does the UltraPAK give a lot more but less useful mainstream stuff? Money is tight so anything higher would be difficult. Many thanks in advance.