I would agree with 5ooNitro about putting too much money into it. If you plan to keep it for your pleasure than no problem but if you think to re sell it and turn a bit of profit you can't have so much invested.

I have an Isaac Hollis in 577 and like it very much. There are a couple of long threads on Hollis here with some very knowledgeable posters. Try a search.

Oh, welcome to Nitro Express and the world of Double rifles.