As buying used is not a concern, there is looking to be wriggle room in the budget, to try out additional devices used in conjunction with the Speakers. To investigate and learn if improvement of the Speaker Purchase End Sound is attainable.
I strongly suggest the use of Suspension Footers / Separators under Speakers, the ancillaries bought as used Purchase will give very very good VFM.
Cabinet Speakers utilising Suspension Footers / Separators as a Tier on a Sub Plinth assembly for Mounting Speakers really do benefit from the usage of the Suspension under the Speaker.
The Links are showing Footers of the same type I own and have a large qty.
These as a result of being loaned to Cabinet Speaker owners has been instrumental in their following up and creating a similar impact as the AT 616.
Townsend - Gaia - Stack Auva are Brands now used under Speakers of Individuals both directly influenced and indirectly influenced by my loaning AT 616 to other set ups.
The Links are showing the types of common prices seen in recent years for AT 616 which is very competitive, when compared to other prices seen from New Brands producing products to do similar.
My Suggestion is purchase 12 x AT 616 - gives 6 x for Two Speakers and 6 x for Two Audio Devices, which can be selected for trialling and kept with the the Footers when the benefits are heard in the End Sound.
There is no depreciation at these prices, outside of Japan if sold in another Country any Shipping and Import will be recovered at the time of a sale.
https://www.fromjapan.co.jp/japan/en/auction/yahoo/input/t1192434588/
https://www.fromjapan.co.jp/japan/en/auction/yahoo/input/j1185228158/