I'd be more than a touch dubious,of ANY "Smith" who suggested a Seven for the application,as there's no redeeming "advantages" inherent and it is indeed a series of concession(s). Sounds like your "Smith's" "experience" revolves around SuperSoakers. Run Forrest...run.Hint.

700 is the way to go,as one can largely do as he pleases in regards to throat/COAL latitude harmony and repeat...that either massaged nether regions or DBM. I'd personally go DBM,but that is a subjective determination as there may be some who think more highly of a Wyatt box,than I. Obviously,700 bottom options more than abound. Hint.

I prefer shorter tubes,due their versatility in applications separate from playing Range Queen. Nailing good balance and better handling,is a breeze with modest spout length and an impossibility with extended tubes. I'll trade a coupla clicks of erector dope at 1K,for them attributes and HAPPILY. Hint.

Never heard of an A5.