Are you planning to hand quilt or machine quilt? That could make a difference on whether or not you want to have the quilt machine basted by a longarm professional.
Machine basting is a great idea if you are going to hand quilt. If you plan to machine quilt it yourself, it's preferable to either pin baste or spray baste the sandwich. Spray basting is fast and easy to do at home, and considerably less expensive than having the quilt machine basted. When you are machine quilting, you do not want to have to stop every few inches to pull out basting threads and/or try to pull out basting threads after you have machine quilted over them. Machine quilters usually either pin baste or spray baste.
(I liked #1 the best too.)
Mary