For a primary HTPC I would
For a primary HTPC I would recommend going with a Core i5 myself. Though you may want to look at the Core i5-2400S as the Core i5-2390T isn’t available retail AFAIK.
I’m a big fan of the DH61AG and use it for my primary system but do you plan to have an optical drive? If so, you may consider a different board or replacing your SSD w/ a mSATA SSD. The DH61AG only has two SATA ports. You’ll want one for a dedicated data drive. If you use the other for your SSD then you are limited to USB optical drives. If you use an Intel mSATA SSD then you free up one of the SATA ports. Just some other things to think about.
Note: Mentioning the data driver being a requirement since you mentioned a CableCARD tuner. You do NOT want to record to your SSD, even if a few people do it, it is not recommended.