Well...
1. gaming 5 and gaming 3 have better audio than SLI PLUS
2. msi gaming series use
high quality component would better than SLI PLUS.
3. overclock performance gaming 5> SLI PLUS> gaming 3
4.gaming 5 and SLI PLUS would support sli.
If you have enough budget ,you should go gaming 5 ,all point would better than other.If you relly don't need sli and go a wild overclock ,I would go gaming 3(better component and audio than sli plus).If you need sli and heavy overclock ,go SLI PLUS would be fine.
Motherboard tier list: Z97 chipset
Tier One-Class B: Enthusiast Level. Premium featured MoBos with SLI capability, M.2 and enough power to run any current CPUs with very high-extreme OCing capabilities. Just a step lower than Extreme Enthusiast boards, they’re no less than feature laden. Solid quality, shall serve you long.
Z97X-Gaming 5 (not to be confused with MX version)
GAMING 5
EXTREME6 (AC as well)
UD5H (BK as well)
Z97-PRO (AC as well)
MAXIMUS VII HERO/ RANGER/ GENE/ IMPACT/ FORMULA (great boards for OCing)
GA-Z97X-SOC
Z97 FTW
Z97X-Gaming 7
MSI GAMING 7
PROFESSIONAL
MPOWER (MAX AC edition as well)
DELUXE (NFC&WLC edition as well)
Gaming 9 AC (ACK as well)
Z97-GD65 Gaming
OC Formula (mATX version included)
PRO GAMER
GA-Z97X-UD7 TH (No M.2)
Z97X-SOC-FORCE (no M.2, but great for OCing, has SATAe)
Sabertooth Mark1/ Mark 2 (no M.2, great for OCing)
G1 SNIPER (No M.2, but this MoBo hit 5Ghz mark stable in some reviews)
Z97 Gryphon
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Tier Two: High end. Great MoBos, SLI capable with good enough thermals and power to take up any CPU, not the best for extreme OCing but do OC very well. Have many premium features as well. Quality is good, no known persistent issues.
Z97X-SLI
MX-Gaming 5
G55 SLI
G45 Gaming
Z97S SLI Plus
Fatal1ty Z97X Killer (mATX included)
EXTREME4
Z97X-Gaming 3
UD3H (BK as well)
Z97-A
Z97M Gaming
Z97-E
Z97-AR
Z97S SLI Krait Edition
Extreme3 (no M.2)
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Tier Three: Mid range. Crossfire Capable MoBos with SATA III for budget oriented gamers. Power phases and thermals are not awesome, still decent for everyday use and some decent OCing, but not with the highest TDP CPUs. Have all the standard features, M.2 is not a compulsion though. Quality is decent, OCing ability is moderate for most boards.
PC MATE
GAMING 3
PRO4 (mATX version as well)
Z97 HD3
Z97 D3H (mATX as well)
Z97 G43 (mATX as well)
Z97 Fatal1ty KILLER (Not the ‘Z97X’, which is SLI capable- Both are good at OCing)
Z97-K/CSM
MSI U3 Plus
Guard Pro
Z97-C
Mini ITX Form Factor (Not CFX capable):
Z97I AC
Z97 GAMING AC