sorry i cant go through all this
what is the latest stable firmware you recommend
xmanster, as posted in the post immediately before yours, i made the following comment:
"r23919 and r24461 are still basically the best "All Round" firmwares for the G450H the r25xxx series also appears to load the router a little heavier than the older revisions; I'm still trying to work out why (May be new UI or extra services doing it)"
In other words, those two numbers are my recommendations, and as always start with the lower number, if that works, don't upgrade unless you have to.
As a polite OT comment however, if you "can't go through all this" i worry that you will have issues with the firmware somewhere along the line. DD-WRT Firmwares are for people who want very specific controls over their router, if you cannot read through my first post or the comment immediately before your post i really would like to know what gains you think you will get from DD-WRT? It's not really a plug-and-play firmware and i would recommend you use the Buffalo Stock Simple Firmware over DD-WRT otherwise, like it or not, you are going to have to do a lot of reading...
In other news, r25934 seems to be OK on my three routers (UK/EU/US) so feel free those of you who are having issues with older firmwares to upgrade here:
ftp://ftp.dd-wrt.com/betas/2015/01-16-2015-r25934/buffalo_wzr_hp_g450h/Please note however, as usual, only upgrade if you need to and the r25xxx issues with slower-throughput and new but slower interface are still there!