When you say "Diamond Resorts US Gold Members and we have another US Regional Membership" do you mean you are in The Club where you have US Collections contract or contracts with 30,000-49,999 annual points, plus a resale US Collections contract of some amount of points? What specifically do you own which is participating in The Club and what specifically is not participating in The Club?
I've done that, buy from DRI and in some cases they combine multiple contracts into a single contract. I like that a lot, especially because when you sell a Collections contract you are allowed to break it a part (at least in the past this was allowed). So you can sell the whole thing and there is only one transfer fee or you can sell what you need to sell. In the past DRI was more willing to combine multiple deeded contracts into a single Collections contract, but one time in 2008 I think they allowed me to combine a couple of contracts into the HI Collections contract I bought. So maybe they'd let you combine your US Collections contracts into HI Collections with your purchase of the HI Collections contract.
The benefit of doing this is you only pay one base fee (for the HI Collections). I think the base fee is now called an operational fee. Currently I think you are paying two (one for the US Collections in Club and one for the US Collections not in Club) and if you merely bought HI Collections you would have three base fees. Are base fees about $250 or $300 in 2011? So you could pay one roughly $300 base fee if all your contracts were combined into the HI collections and of course it would all be in Club, which is way better than merely adding another contract where your three base fees would be $750-$900 total. Or as I believe you have now $600 for the two separate accounts holding your contracts in and not in Club.
I haven't looked at the 2011 billing yet, but based on 2010 here is what I understand the difference in cost between US and HI collections contracts to be:
HI ($228+$9.50=) $237.50 Operational Fee, $245 The Club Dues if in Club, $0.1127 fee per point owned
US $197 Operational Fee, $245 The Club Dues if in Club, $0.1102 fee per point owned
- NOTE: I can't remember if the $245 Club dues are for The Club or for being in Collections, then if you are in The Club there is an additional $50 fee.
So yes, HI Collections is more expensive, although I don't consider the additional $40 Operational Fee significant, and the additional $0.0025 per point is an additional $125 if you had 50,000 pts (enought to be Platinum).
What do you get for $165/yr more? What do you lose? Well, if your priority is HI then the additional 3 months to reserve could be important, and if you travel to St Maarten/etc perhaps the additional 3 months booking time is important. I tend to travel less than 10 months in advance so the important thing to me in the past was eliminating the redundant operational fees. Overall though, if you can buy the same point values in US Collections for less than HI Collections, and whomever sells you the additional US Collections brings your resale contract into Club, you win twice since the purchase costs less and you only have one base/operational fee. And especially since resale value is terrible for timeshares, it doesn't matter which contract you buy from DRI, except the topic of if you need the additional 3 months to book units!