High shifting effort

Hey All,

I've got a 96 5spd DX Hatch. I've noticed that it's a bit difficult to get into gear (esp @ a stop and down shifting) at times and a little notchier most other times.
I'm not pushing the car hard, it's only got 80,000 miles and I changed the fluid about 2 weeks ago. It's not leaking, but could slightly low or high fluid level cause this (probably not more than +- 10%)? I'm pretty sure I was on level ground when I added the fluid, but it may have been off by a degree or 2.

Would you recommend Red Line over Honda MTF, if so, which Red Line should I get, and about how much does that stuff run.

I thought I'd open this one up to you guys, as I'm not the tranny guru...thank you.