If you want a v6 swap, you should have started with a v6 accord.
A k24 would be better than a k20 in this case because these aren't exactly light cars, you need the extra torque in the k24. Hp numbers aren't everything. A k swap was never even completed in these cars and I'm guessing you don't have the skill to be the first guy ever to finish a k swapped 6th gen based on this thread.
An h motor is always recommended for your car because they're great for the price and almost a direct swap. I prefer it over a k20. The only things (in my opinion) that makes a k better than h is they weigh less and respond to mods better, but the cost difference is too great.
If you, you can turbo the single cam you currently have. They can handle a good amount of abuse and you can get over 200hp easy, more than a stock k or h swap.