Hello builders and the lot of you,

I have a question about a bike I would like to have built, but curious what you guys think about it before I go putting money down and what not. Here we go:

I want a 29er touring/mountain bike. What does that mean?

I would like to have it built with a fork and all kinds of braze-ons so I can carry panniers and use some skinnier tires for touring which sounds great and I know it possible. BUT, I would like to be able to take off the rigid fork and put on a say 120-140mm travel fork and still have the angles not be so stretched out that it is like a chopper bike.

Two sets of tires and two forks for two bike being smashed into one. Is it possible or will the head/seat tube angles be too extreme one way or another? I would prefer something like a 68ish HTA with a suspension fork and then something near the 71 mark for the rigid jam.

Any thoughts? Steel bike also.

Thanks for letting use nobles pick your brains.