I am looking to upgrade my old infinty speakers that i have had for close to 15 years or more. I have a large open concept living room. I am looking at setting up a 3.1 or 3.2 system. What i would lke to do is get bookshelf speakers and center with a pair of decent subs. What i want to know is if svs ultras are worth the big price difference from the HTD level 3? I would like to keep the budget down so i need to either splurge and get the ultras and save for a sub later or get the HTD level 3 and a cheap set of subs or one nice sub.