Going to a Windows Phone is a bad idea. Like a previous poster, I also had the Samsung Focus along with my Samsung Galaxy Captivate and Motorola Atrix. Of the 3 devices, the Focus was the least used. The reasons are simple. While you dont need beefy specs to run WP7, there is so much lacking.
Dropbox? Forget it. You can only view the stuff you have on there. You cant upload to it or download from it without 3rd party apps, which are very few to begin with.
Texting Tones? Sure you can change it, but you must use Windows OS, Zune software and have them specifically named as a "ringtone" with under 1MB in size and less than 40 seconds. They also must be in MP3 or WMA format. If the tone you want to use doesnt meet those requirements, then it will not even show up in the software.
Not to mention the fact that while you can add tones to your phone, it is a universal tone. There is nothing like customSMS or GOSMS Pro that will allow you to use a different text tone for each person. So if you are a heavy texter like I am, then this is a killer. Cause you will not be able to know if the text you got is something you have to read right away and respond to or if it is something that can wait.
Additionally getting updates is worse than Android. I got the Focus when WP7.5 "Mango" was already out. yet no matter what Zune and my phone both said no update available. I had to basically trick the phone to update, which in itself was a pain, to get it to work.
With the lackluster supply of quality apps on the Windows Martketplace compared to any other mobile OS, you will be bored far to quickly with a Windows Phone than anything else. If you have unlimited data, cant live without Facebook updates every second, then a Windows phone will be great for you! But if you live in the real world where you have to pay for data and only have so much, you will get killed by a Windows phone.
I sold my Focus about 3 months after buying it. I hated the phone after about a month of use cause it had nothing that I could do. I went back to Android with the option of flashing some sweet ROMS quickly, I can say if your bored with Android so quickly, you havent tried everything you can yet.