Gimme some links to them. Please and thank you. Some combat-orientented maybe.

This mod adds a shop in the Great Bazzar that adds a whole slew of weapons and armor.

There's another neat one (the name escapes me, but I'll look for it. I've got all night and nothing to do) its got tons of really cool weapons. I'll go a searching now.

You can try Mournhold Mansion too, it adds a wonderfull mansion to Mournhold, and you can find two new retextured sets of armors and some wepons...
You can find the Mournhold Mansion here and the add-on here.

I have been playing just mw without expansions for a week or so. I just got Tribunal and Bloodmoon but haven't installed either.

I am hesitating because someone told me that doing so would change the game (where I've been so far and where I am now), for example, assassins will try to kill me in my sleep. In MW, sleep is a pretty safe place.

ARe there other such "surprises"?

Is the addition of Tribunal seamless, otherwise?

Sorry about the above message, I accidentally posted it to the wrong thread. OOPS!

There is an edit facility that lets you edit your post rather than post twice in quick succession.

If you haven't reposted elsewhere I'll answer anyway as you admitted the slip was unintentional. You must instal Tribunal before Bloodmoon to prevent running problems. There are no other 'surprises' than the one you mentioned. People attack you in your sleep anyway in MW after you reach a certain point in the main quest. With Trib you can get the attacks stopped after the first if you choose. However you might like to kill the assassins and sell their armour. It's a quick way of getting reasonable resources without cheating.