Craig - Man that's awesome to hear. I'm a little humbled to see you're including LIVID in the top 10; I think it's great and so do those that have had it. So much so I'm trying NOT to brew it again in a 3gal.

Just so many ideas and recipes running around my BrewTarget database. Man you're going to have a great time when you get started.
Honestly, and this is just silly, but I've been stressing over my CO2/Temp Controller setup for my beer keezer project. Kegs are just hanging out filled and conditioned, they need to be chilled and hooked up to serve. I'm still enjoying the bottles if you can believe that!
Something nice about being able to pop the top on a new, cold brew. But that's offset by how damn convienient it is to rack to the keg/seal/pressure/and forget.
I've probably said it 20+ times by now, but if you don't care about your CO2 to style and are happy with the 2.3-2.5 of most commercial American beers, DO THE SUGAR CUBE TRICK. One for a 12oz, two for a bomber. Done. Happy. Moving on...
Riha -
I don't yeast wash, but I do collect the slurry and hold that. I've held slurry from batches for up to a month and have had successful pitches with no issues. From what I understand, yeast washing usually benefits most if you're looking at long term storage.
I tried to time/develope my recipes so that I'd use at least one of the slurries within a month. Brewing every weekend in the winter, it wasn't hard to have a home for US05/S04/Notty/S33/etc. Now in the summer, where I've been busier than I want, I've knocked it down two only two slurries both usually ales.
AFA lager yeast, you've got a few things going against you, but remember that the beer doesn't need to lager (or cold condition) on the yeast cake. You can lager off in a keg, in bottles, or even in secondary if you want/do it.
The problem with lager yeast is -
1) You already pitched usually a double batch right off the bat.
2) It's very fine, so you'll need to cold crash the crap out of it to get it out so you can save it.
3) Depending on the D-rest, you could have some tired yeast already at the point you want to try and save it. Stressed yeast still work, but they don't work as well as happy, healthy yeast.
IMO, it's easier and better to just pitch a new package of fresh yeast for the next round of lager. Keep in mind, though, I don't do a lot of lagers - maybe 1:10 brews I do would be a lager. I don't have cold storage enough to keep cranking them out, and the turnover rate on ales is so much faster.
I like Saflager W34/70. I'd really like to try the Swiss lager Fermentis has, but I'm not interested in 500g of lager yeast.
