Ryan,
You are making a smart choice by going to Dr Umar. You've already done the research for yourself, thats obvious....
The H&W crew are always going to be here trying to convince you its the best thing in the world and that they have your "best interests in mind"... kinda like an overbearing parent - btw, none of these guys have an MD and none of them know you.
Fact is that if you have the following criteria you are a great Umar Candidate.
1. you have plenty of money
2. you prefer a short haircut (with H&W people will "see thru" your hair" if you are NW6 with normal laxity and only have 8k grafts in that nw6 pattern - if you like short hair the see through is even worse)
3. you don't want a big scar on the back of your head
4. you can also get off meds if you graft enough... i think propecia is dangerous and in 10 years when there is an epidemic of male breast cancer and sexual dysfunction people will recognize that (don't play with your hormones... people on oral contraceptives in the past never realized there were severe stroke, intracranial pressure, and hepatic adenoma risks; many drugs take a long time to build up their effect and individuals won't report it especially if the dysfunction is sexual in nature)
I just think you should do what you want. I sense you are trying to be "nice" to these guys because you are nervous about your procedure and want "support" but you gotta realize a lot of people on these forums aren't here to be your buddy, but just want to feel important.
You are a smart guy and I wish you luck in your HT and look forward to seeing you improve.
Oh and one last thing, never trust a hair transplant "consultant"... they are just a salesperson who will try anything to build credibility.