Outside of video editing, nothing you mention is particularly CPU intensive. Unless you are doing video editing for a living then I would still suggest sticking with a standard LGA1150 i5 or i7 processor. The issue you are likely running into is one of not having enough ram, not CPU cycles. Load your rig up with 16GB of memory and leave 2 dimms free to up it to 32GB if you need it in the future and you will likely be fine.
Another thing that cannot be overstated is the need for an SSD if you do a lot of multi-tasking. When I did my last big round of upgrades in the house I gave my wife's Core2Duo a SSD while I upgraded to a nice i7 rig but reused my old HDDs. My system had infinitely more processing power than hers for games and editing, but in the time it took me to turn my computer on I could walk up stairs, turn hers on, do a quick web search, and then come back down stairs just as my rig was coming up to the log-in screen. It would take my i7 rig almost a full minute to load up Adobe Premiere and all of it's plugins, where I could load it up on her much older system in ~20 seconds. Point is that you can have all of the processing in the world, but if 90% of what you are doing is loading and unloading programs, then having an SSD is going to do more for you than any other single upgrade you could think of.
Lastly, Xeons are not faster processors. They have a lot of cache, have the ability to have a lot more cores, and can be ganged together so that you can have up to 4 of them running on the same motherbaord. But you cannot overclock them, and 2-3GHz is generally about as fast as they get unless you really pay through the nose. Xeons are production processors, meaning that they are made to run 24x7 for the 5-10 years that they are deployed with minimal down time, and they can generally run in harsher environments like an 80-90*f server cabinet without throwing errors. Great if you are looking for a render farm and need 20+ cores of processing power at your disposal... but otherwise pretty slow and useless.
Also, as Brandon mentioned, having lots of screen realestate is essential when doing lots of stuff. Back before I lost my mind and went back to school, my work computer was a pretty major workhorse. I had 3 nice monitors hooked up, an SSD, and 8GB of ram in it which kept up nicely with the 30+ web browsers, and 10+ office applications that I ran at all times. But the processor behind all of that? A lowly Pentium G2020, and that thing never skipped a beat. For doing video editing I would suggest something more than a Pentium... but your issue is not a processing one, it is a ram and storage problem. Have enough ram to prevent the need for vRAM, and a nice fast storage solution and I think you will be pretty happy.
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