Analog to Digital Converter for my PC?


Hi,
Hoping to get some help from the experts here on AG. 

I want to get the output from my TT into my PC (HP Envy beats audio) to do some sonic analysis of different record cleaning methods and products. I will most likely use Audacity or Reason as the software. My options for connecting an A2D converter to my PC are; USB or a single 3.5mm jack. 

1. What would you recommend for a decent analog to digital converter for around $500?
2. Is it worth the effort to upgrade my sound card to get L/R RCA jacks? 
3. If so, what would be a decent sound card to look at?

Thanks in advance,
Bryan
5d8015ac 008e 4b30 a925 6dcb77e47c3fvoiceofvinyl
Korg DS-DAC-10R 1-Bit USB Digital-to-Audio Converter...
Mytek Stereo 96 ADC Converter is a little above your price point...
Thank you ddude003. The Korg looks exactly like what I need at this point. Thank you.