Try before you buy in Auction House

I have the feeling i just wasted 10mil gold coins for something that improved me sligthly

My monk's statistics

• armor 5260
• Damage 56248.11
• Life 23994
• Chc : 21,5%
• Chd : 167%
• and all resistance 954 ( i use One with everything)

so i decided to upgrade my bracer from this

• Armor 357
• Dexterity 142
• Intelligence 71
• Vitality 60
• Fire resistance 50
• All Resistance 60

to this, making me 10mil gold poorer

• Armor 386
• Dexterity 112
• Vitality 78
• Fire Resistance 47
• All Resistance 62
• CHC 4,5%

Better armor, better vitality, same total resistance and less dexterity..Can't be wrong! After equiping this I only got a boost of 2k damage and 700 health.

Is this bracer worth its money? How can I avoid spending my gold in vain again?