I have a Turk, a Spanish, and a Czech and they are all very adequate for my purposes. That is, as hunting rifles. The Turk was shot out when I got it, not a trace of rifling so I had it re barreled. The Turk is a large ring with a small ring barrel thread so it has an old 6.5x55 barrel on it that my local smith re bored to .30 cal and made me a 30/06. It sits in a Butler Creek stock with a 4X scope on it and is my favorite rifle. The Czech is in a walnut stock that I had turned, again by my local smith. Other than the fine walnut this one has a Lyman receiver sight and a nice ramp front with a gold bead. It is still in it's original chambering of 8x57 in the original barrel. It is just like the old Mauser sporters from the bygone days. It is a fine shooter and carries like a dream compared to any scoped rifle despite it's 24.5 inch barrel.
The Spanish is sitting in my basement for now having been a short barreled FR8 in it's previous life. I am waiting until the urge strikes me to build another gun and see what I come up with for that one. I would like a 358 win or maybe a 7mm 08 or perhaps even the 7x57.
Bottom line is most 98s are very very good rifles. If you want a shooter just look to see what is left in the barrel and have the head space checked. Hand loaded ammo can bring the old Mauser cartridges back to life compared to what is on the shelf for factory loads, but you must be certain what you are dealing with first. Your local Gunsmith can help you to determine what is best for the project you have in mind.