I need some good fenders to go along with my Topeak Super tourist pannier rack. I have a jamis sputnik 09 and would like something that keeps me protected but doesn't add too much weight. I'm looking at both of these- the Planet bike are heavier but seem to have better coverage. Not really sure which to go with.

Also- the sks are sized to fit different sized tires- I have both 23 and 25 on my bike. I'm guessing go with the 25?

https://www.amazon.com/SKS-Raceblade-...s=bike+fenders

https://www.amazon.com/SKS-Raceblade-...s=bike+fenders

Any recommendations are greatly appreciated.

Since it appears that you have eyelets for fenders use bolted on full mudguards if you want to stay dry and not fiddle about w/ re-fitting.
The raceblades are a compromise for bikes w/o eyelets but not the best coverage.
PB & SKS make good kit that is light, solid and inexpensive. Just match tire size & proceed.

-Bandera