Getting a New Dog, Advice pls Options

I love dogs and have owned several guard dogs. Until years ago, one of my girlfriend introduced me to a toy dog breed and now I owned an imperial shih tzu for 2 years I loved dearly called Mouchi.

A few months back, I bought a Yorkie (yorkshire terrier) named Tasya which are very much terrier at heart. She was very active and naughty. Mouchi hates her. Tasya likes to charge Mouchi's ass like a bull for the fun of it, and at one time she was so naughtly excited chasing Mouchi's ass around the house, she fell down from the second story and to my dismay Tasya died. Mouchi seemed relieved though (IMG:style_emoticons/default/rolleyes.gif) and don't have to protect her ass from Tasya anymore.

I wanted to get another toy dog, especially a miniature schnauzer, a westie (west higland terrier) a pug or at the very least another shih tzu. It seemed Mouchi is not very sociable to other dogs and I'd like to have a dog who at least doesn't frustate her as Tasya did. What breed do you suggest I should get which may have compatible temperament as Mouchi's playmate?

I'm picking up a new yorkie tommorow! (IMG:style_emoticons/default/laugh.gif) Well, I've been missing Tasya for a month and today when picking up Mouchi from the doggie salon I chatted with the owner, and my vet happens to be there and he told the owner of how beautiful Tasya was, making my heart sunk. I finally decided to call my breeder and told her what happened and asked if she has any yorkie litter left. She has 2 left and sympatheticly asked me to come over and get it. Still have to pay for it, but I'm looking for a big discount she promised me. Two puppy is not much a choice to choose from, but hopefully.... (IMG:style_emoticons/default/laugh.gif)