i put the bikersfriend bag on my vegas. It keeps the classic look almost like a bed roll, the lines of the bike are maintained without saddle bags. I can get alot of stuff into mine
+1 On Muckers comment. I love mine and it doubles as a backrest.
i am pretty sure i got the medium large. The large was too long but the medium was wide enough and holds everything i need!
I picked up a Saddleman at the spur of the moment for a solo rack on my High-Ball. Appears to be quality enough, in a textile rather than leather bag. Only complaint is I wish there were a more intuitive means of attaching it rather than looping around and around, then pulling tight on the straps then having a bunch of slack left over.
I have just gotten myself a Vegas Low, and the only thing that I find "lacking" is somewhere to put my "stuff". I ended up buying a OGIO tail bag, part # 104580, it attachs to the rack on the back fender, and it has quick release buckles so you can take it off and on pretty easily. It even has a zipper to expand the bag for more room, it has side pouches for things you need to get to more often and quickly. Check it out. I think it works well, and keeps up the sleek line of the Vegas. Of course this is for only around town, or overnight trips.