New build suggestions

cannot view. im pretty dam sure that the lenovo is perfect for a htpc given hardware is still pretty fast

I can't seem to access your list. Try mocking up a list on PCPartpicker.com

sorry about that. i will edit the post. here's the parts:

nMEDIAPC Black Aluminum / Acrylic / Steel HTPC 6000B ATX Media Center / HTPC Case - $74.99
BIOSTAR TA75M FM1 AMD A75 (Hudson D3) SATA 6Gb/s USB 3.0 HDMI Micro ATX AMD Motherboard - $79.99
CORSAIR Builder Series CX430 430W ATX12V v2.3 80 PLUS BRONZE Certified Active PFC Power Supply - $39.99
AMD A6-3650 Llano 2.6GHz Socket FM1 100W Quad-Core Desktop APU (CPU + GPU) with DirectX 11 Graphic AMD Radeon HD 6530D AD3650WNGXBOX - $74.99
Kingston HyperX 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1866 Desktop Memory Model KHX1866C9D3K2/4GX - $32.99
LITE-ON DVD Burner - Bulk Black SATA Model iHAS124-04 - OEM - $17.99
Rosewill RNX-N150PCe (RNWD-11011) IEEE 802.11b/g/n PCIe 2.0 Wireless Adapter Up to 150Mbps Wireless Data Rates WPA/WPA2 (AES, ... - $14.99
Arctic Silver 5 High-Density Polysynthetic Silver Thermal Compound AS5-3.5G - OEM - $9.99
Western Digital Scorpio Black wd5000bpkt 500GB 7200 RPM 2.5" SATA 3.0Gb/s Internal Notebook Hard Drive -Bare Drive $74.99 ( I have a pc with a 1TB HDD and I will use that and replace it with this one)

Total - $420.91

the computer you already have is way stronger than what you are trying to build here

I'm a newbie (so cut me some slack for this question). Should i use my pc as the main htpc and the new htpc as secondary?
If I do go that route I would want to change my case to something similar to the one I originally posted above. Do you have any suggestions? Also should I do any upgrades to the Lenovo?

Thanks

you can keep the lenovo you already have for whatever tasks that you demand it to do. if you want to build a new pc for something else, you can but only if you really require 2 pcs