I've been dabbling (also as a side profession designing and installing AV speakers) in the audio world for 20+ years as well and recently installed 4 zones of outdoor speaker depot speakers on our deck, patio, and pool/spa area and have been very impressed. You can usually find open box deals on ebay for nearly half the price of retail which is a STEAL IMO.
Here's my setup:
Receiver: Integra 30.4 from accessories 4 less (200-ish) and has full app control for source, volume, tone controls, etc
Speaker selector/switch: monoprice 8 position, impedance matching for about 20 bucks
Deck speakers:
OSD Audio AP840 Outdoor Patio Speakers - Pair (I paid 150/pair on sale)
Patio speakers:
OSD Audio AP850 Outdoor Patio Speakers Pair (I paid 150/pair on sale on ebay)
Pool speakers (2 sets)
Outdoor Rock Speaker OSD Audio RS850 ( Paid 120/pair open box on ebay, these are really nice)
Source: Sonos connect (highly recommend this), you can also stream spotify directly from the receiver I bought but I like this control better
Subwoofer: JBL control SB210 from ebay for ~150 ish (hooking up this weekend, will probably add 1-2 more of these). Will likely try out different setups this summer
Sub amp: Crown XLS2000 I had laying around, using the 12V trigger from the receiver to turn on/off automatically
Wiring: 12/2 southwire 100% stranded copper from Lowes (250' spool is about 100 bucks)
BTW I've also heard good things regarding the inexpensive monoprice sub/satellite setup above.