NAD, and Vandersteen

If you could stretch to around 1100 you could probably land a DK design Mk2.

Most Nad intergrateds do provide both out and main jacks...they did on the C350 amp I used to own...what a great little amp...and yes Nad mates well with Vandies....as my local dealer often pairs them both...Nad has a big and bold presentation...very dynamic...which goes well the spacious, non-fatiguing sound Vandy is known for ...If you plan on spending up to 1k...then Nad does look less appealing as there are many choices which include better build and possibly even better sound...and then there is the NAD master series!

Although i have never done this...on paper... a lively Brit amp such as a Naim, Creek or Musical Fidelity in theory would be a nice match...might have to go used to do this...but well worth the effort IMHO...if funds are tight...Rotel comes close to this sound...

Find a pair of used Quicksilver Mini Monos and a Quicksilver line stage. later you can add a 2WQ and own an amazing system.