should buy new dell 5820 precession tower or wait for new i mac pro...

hey guys

i m going to buy new workstation with these specs...

Processor :-

Intel Xeon Processor W-2155

13.75M Cache, 3.30 GHz

Operating System :-

Windows® 10 Pro for Workstation (4 Cores Plus) Multi - English, French, Spanish

Chassis :-

Precision 5820 Tower 950W Chassis

Graphics Card :-

NVIDIA Quadro P5000, 16B (5820T)

Or

NVIDIA Geforce GTX 1080TI 11GB Founders Edition

Memory :-

64GB (4x16GB) 2666MHz DDR4 RDIMM ECC

Boot Drive

Dell Ultra-Speed Drive Quad PCIe SSD x16 card, 1 M.2 512GB PCIe NVMe Class 50 Solid State Drive

Hard Drive Controllers :-

MegaRAID SAS 9460-16i 12Gb/s PCIe SATA/SAS HW RAID controller (4GB cache)

Hard Drive :-

3.5" 4TB 7200rpm Nearline SAS Hard Drive x 4 =16 TB

RAID Configurations for SATA/SAS Hard Drives/Solid :-

RAID 10

PCIe I/O Cards:-

USB 3.1 G2 PCIe Card - 2 Type C Ports. 1DP in

it costs almost 7517$ to me

or should i buy new upcoming i mac pro with same config..??