I normally recommend the BK14 with the original scales, that is my go to small fixed knife. Does everything with ease and the blade shape is just amazingly universal.
Love that knife - sing it's praises all the time!
The BK14's grip would be perfect if it was a tiny bit longer, but it isn't.
So if your hands are size nine ish and you look to use the knife for an extended bit of time, the Esee Izula II is a very comfortable contender.
Regarding the Tops Delta 3: I've had that itch as well and scratched it:


Despite Its totally ridiculous thickness it is actually a versatile little knife - But here also lies the problem.
The scales are not well rounded and blockish, so you won't have a hotspot free grip when using it for a while.
I get hotspots after 20 min of continuous use.
If you want to use the knife regularly get something with a more ergonomic shape.
There is the :
1. Terävä Jääkäripuukko 85 - Small knife with a great rubber handle and also a stout little fellow.
2. Esee 3 Hm - That is a still small knife but with a amazingly ergonomic handle.
3. Esee Izula 2 - very well known and a good candidate
4. Spyderco Streetbeat LW - If you like the cutout in the handle - Good stout knife
5. Spyderco Enuff Series - Good ergos and cutting like a laser...
There are many more that were already mentioned