Here's my suggestion for weapon replacer mods, textures and models.
Generally, I don't go for the high poly super HD weapons first, I tend to stick to vanilla style, preferably optimized models first.
As ever, this is not a complete list, I am not claiming these are the best replacers either, just the one that I am currently enjoying.
The mods are listed in the recommended installation order (for MO2 users, that's your left panel).
Some optimized models
Morrowind Optimization Patch mop covers A LOT of meshes, always start your install with this. You are still free to upgrade models later on.
All weapon textures
Darknut's Little Weapons Mod Complete
With this, we get rid of vanilla textures, most of the Darknut's textures will be replaced by other mods. Think of this as your safety net, or of course, stick to vanilla textures.
Insanity's (Dwemer) Weapons of Morrowind - For Morrowind by InsanitySorrow as well as Remiros and starwarsgal9875. Port of InfinitySorrow's Dwemer weapons for Oblivion.
Real Reflective Weapons - Iron by Pherim. A classic.
Improved Weapon Meshes - Steel by Pherim. The other classic.
Some Iron and Steel
Insanity's Weapons for Morrowind Port of InsanitySorrow's Oblivion weapons (includes the spiked club and glass sword, install after Smooth Glass Weapon if you want this one)
Bonemold Bow Replacer by Remiros
Dreugh and Chitin
This WIP is available on the Thastus Guide page. Includes a replacer for corkbulb and Bonemold ammo as well as spiked club and bonemod arrow : install after the Bonemold Bow Replacer by Remiros and InsanitySorrow's iron and steel replacers if you prefer the models from this WIP.
Katana, Tanto, Wakizashi
Oriental Mesh Improvements by Psymoniser. Optional, this will replace some iron and Daedric models, install after Daedric Intervention if you prefer these.
Daedric Intervention - Weapons by Articus. Looks great, very HD.
Improved Weapon Meshes - Ebony by Pherim
Wooden Staff Replacer by Remiros.
Rubber's Weapons Pack by Rubberman who was very inspired this last May Modathon and gave us a bunch of weapons.
If you want the massive Sixth House bell hammer retextured, check Articus 6th House Dagoth.
HQ Weapons - Artifacts merged by EJ-12 and Qwerty. If you've been around the modding community, you will know that the Russian modding scene has given us some of the most amazing models. More often than not, these models will make the average computer cry. Some models are sometimes very extravagant and not to everyone's taste. Artifacts are unique and imbued with divine powers and that, calls for HQ weapons.
Remiros has make a few unique artifacts as well, if you want something a little less flashy: Volendrung HD, Chrysamere PBR, Mehrunes' Razor PBR and The Tools of Kagrenac.
As ever, do let me know if you feel I've miss something important!