Your amp would seem fine but you will need a RIAA pre-amp. However before getting onto that, why do you want a Beogram? If you have a B&O system, the point of a Beogram is obvious as it matches the system, the input is designed for the low moving iron output and it works by remote control.
In a non B&O system, I cannot see the point of a deck like the 8500. It is relatively lightweight, it takes a unique cartridge fitting which means replacement cartridges are expensive and have to come from the US these days, and the performance will be easily matched by cheaper decks.
If you really want a B&O deck, and plan to get a matching system, go for it. But if you plan to just upgrade to other makes, I would look at the Project decks or even a Rega Planar. You can then get a much greater choice of cartridge at much better prices.
The 8500, and all the later tangential decks were not a highpoint of B&O record deck design. The radial decks like the 1700 and 1800 were in many ways nicer and cost next to nothing. If you want a tangential deck, the 4000 or 8000 series are beautifully made and designed - though not without their own problems!