Desktop Pc for 3D in blender... suggestions?

Hi all, I’m planning to buy a new Desktop PC.
Since graphics cards (GPU) get updated quite fast on the market, I was planning to buy an already assemble Desktop Pc, and in the future change just the GPU or update the HD, or add more RAM.
I’ll use mainly with Blender for 3D, may I ask you which is (from your point of view) a good already assemble pc that you would suggest (no monitor just the pc)?
The Budget limit will be around €2000 (I’ll consider boosting with a lot of ram, like 32GB, during the purchase)
Any help?
Many thanks

I’m using now a Laptop Asus ROG:
Operating System Windows 10 Home 64-bit
CPU Intel Core i7 4720HQ @ 2.60GHz
RAM 16.0GB Dual-Channel DDR3 @ 798MHz (11-11-11-28)
Graphics Generic PnP Monitor ([email protected])
Intel HD Graphics 4600 (ASUStek Computer Inc)
2047MB NVIDIA GeForce GTX 950M (ASUStek Computer Inc)
698GB Hitachi HGST HTS721075A9E630 (SATA )
119GB Micron_M600_MTFDDAV128MBF (SATA (SSD))