I was in the same boat. Owned some 1/48 and some V1 1/60. New standard was the V2. Should I start collecting the V2 and get rid of my other ones? Money was tight so I started selling off other non-Macross Toys. I decide to sale off my V1s. Compared to the 1/48 the V1 are ugly. Before I decide to get rid of my 1/48 I order just one V2. One I ordered was the VF-1D. I never owned that model and it was something different not offered in 1/48 form. I got that, my first V2 the VF-1D yesterday.
The V2 is a great improvement over the V1. The V2 is not a great improvement over the 1/48. It is just different. The V2 seems to have more accurate proportions but the 1/48 is just more detailed. I can't see selling my 1/48s. They are still very good toys. I can't see buying a V2 version of all the VF-1 I own in 1/48th form. Not to mention the V2 is well over priced. Only two types of V2 I will be buying. Those on sale and ones that offer something I don't already own in other scale.