When an ISP should run their own IRR for customers

I'm querying the community on the feasibility of running my own IRR on behalf of customers whom probably aren't/won't register their own objects. I'm going down this path since I don't believe RADB or ARIN would let me register objects on behalf of my customers. I know I'm going to need this in the near future once my AS starts to peer. Conservatively I would be proxy registering about 100 customers. Would a potential upstream/peer NOT want to query my IRR because I'm not RADB, ARIN, etc (Essentially not a well known registry)? If not, is it likely my IRR could get mirrored by RADB so other networks can retrieve good info via RADB. If I was to run my own IRR is Merit's IRRd they way to go or is there something better? Thanks