I'm only answering with anecdotal information....I don't own the VP180. But as things are a bit slow around here of late, it might take awhile before you get an answer from someone with the same equipment to answer definitely.
I also have the Ti series (2004 purchase), but have been considering upgrading to the VP-180, so I've at least watched threads and posts very carefully since the VP180 was introduced.
I feel confident that the 180 will match well with my older speakers. There have been improvements in the line over the years, but the basic signature of the sound overall is the same.
I say "go for it"!
(Then you can tell ME definitely how it matches!)
