First of all, there's no need to pay any money for ripping CDs. EAC will do an even better job than DBPoweramp, for the low, low price of $0. Once you've set the correct read offset for your particular drive and configured gap detection correctly (there are plenty of guides on how to do that) there is not a more accurate ripper available for the Windows platform.
I'm not a huge fan of JRiver, but if you want to continue using that program, make sure you have the memory playback option enabled. JRiver from the hdd rather than RAM sounds noticeably worse than Foobar to my ears. With MP enabled, the two are roughly equal. JPlay is the best sounding playback software available for Windows, and it's capable of running with the JRiver shell if you want to do that, though you'll get the best results in in pure hibernation mode.
Third, download the Fidelizer program. That basically allows you to have your cake and eat it too. You can use your Toshiba as a general purpose computing device, and when you want to use it as a source, start Fidelizer which will temporarily disable all non-essential Windows services. W7 out of the box is configured very poorly for reference grade audio playback.
Fourth, consider upgrading to Windows 8. I don't like the "Metro" interface, but Windows 8 by all accounts has a much better designed audio stack than W7, and sounds significantly better. Upgrades for the moment are very cheap.
Fifth, since you are using the OR5 instead of the V-link, *cut the USB power line*. The OR doesn't need it, and the only thing it can do is make the system sound worse. You can use either a USB cable that doesn't have a power leg such as the one by PI Audio, or use the Short-Block which would likely provide an even more beneficial effect. The power that comes out of laptop USB ports is nasty.