Looking at this list I wouldn't mind going after Eric Bledsoe (PHX) and Okafor if he comes cheap.
http://hoopshype.com/free_agency_2014.htm
Not saying Bledsoe is better than Lowry but I haven't seen Lowry much but I've seen a bit of Bledsoe and he seems more athletic and probably better suited for our style of defense. His durability is a concern, tho.
I've always liked Okafor despite him being a bust. If he comes cheap and we manage his minutes well
(Spo' is known for managing oft-injured players well to maximize their time on the floor) I'd say he'd be a good pick up for 10 mins a night to help on the boards.
Greg Monroe is also a tempting one but he's young and SHOULD want to get paid.
Others say Luol Deng would help a lot but I'm concerned about his durability. Besides we can bring Beasley back
BTW i really like Shaun Stevenson as a SG/PG backup for Wade